Clear UDP in the Network tab of WMP and that should force it to use HTTP or
TCP.
http://support.microsoft.com/?kbid=307650

Signature
NOTE: Replies are to help benefit others
in helping you and reproducing issues, not
necessarily for me to get back to you.
---
> When I try to play movie trailers from the web I receive the following message:
>
> 0xC00D11B6: Cannot play the file
> Windows Media Player cannot play the file. A network firewall may be preventing the Player from opening the file by using the User Datagram
Protocol (UDP) transport protocol. To play this file, try opening the file
without specifying UDP.
> When you enter a URL in the Open URL dialog box and the path begins with "mmsu:" or "rtspu:", you are instructing the Player to open the file using
the UDP transport protocol. Try entering the path using a different
transport protocol (for example, "mms:" or "http:").
> If you cannot use a different transport protocol to open the file, you may need to turn off your firewall to play it. For information about turning off
Internet Connection Firewall, see Windows Help.
> Error ID = 0xC00D11B6, Condition ID = 0x00000000
> Web Help
>
> Using wireless networking through a router and DSL connection. This appears to be a recent problem. Was able to play viideo trailers in the
past.
> Any suggestions?
MALOU - 16 Aug 2004 21:19 GMT
> Clear UDP in the Network tab of WMP and that should force it to use HTTP or
> TCP.
[quoted text clipped - 26 lines]
> >
> > Any suggestions?
Chris Lanier [MVP] - 17 Aug 2004 03:19 GMT
Clear UDP in the Network tab of WMP and that should force it to use HTTP or
TCP.
http://support.microsoft.com/?kbid=307650

Signature
NOTE: Replies are to help benefit others in helping
you and reproducing issues, not necessarily for me
to get back to you.
---
>
>> Clear UDP in the Network tab of WMP and that should force it to use HTTP
[quoted text clipped - 33 lines]
>> >
>> > Any suggestions?
MALOU - 16 Aug 2004 21:25 GMT
THIS ERROR MESSAGE DOESN'T MAKE A BIT OF SENSE ...
Windows Media Player cannot play the file. A network firewall may be
preventing the Player from opening the file by using the User Datagram
Protocol (UDP) transport protocol. To play this file, try opening the file
without specifying UDP.
I DON'T HAVE A FIREWALL
When you enter a URL in the Open URL dialog box and the path begins with
"mmsu:" or "rtspu:", you are instructing the Player to open the file using
the UDP transport protocol. Try entering the path using a different transport
protocol (for example, "mms:" or "http:").
I HAVEN'T ENTERED ANY "URL" ANYWHERE ... I'M JUST TRYING TO LISTEN TO A
BUSINESS CHAT AND THIS MEDIA PLAYER WORKED JUST FINE LAST WEEK.
If you cannot use a different transport protocol to open the file, you may
need to turn off your firewall to play it. For information about turning off
Internet Connection Firewall, see Windows Help.
WHAT THE HECK IS A "TRANSPORT PROTOCOL"? AND I'M NOT TRYING TO OPEN ANY
FILES ... I'M TRYING TO LISTEN TO A CHAT ON MEDIA PLAYER. i DON'T HAVE AN
INTERNET CONNECTION FIREWALL TO TURN OFF. WHAT IS GOING ON WITH THIS?
Error ID = 0xC00D11B6, Condition ID = 0x00000000
Web Help
> Clear UDP in the Network tab of WMP and that should force it to use HTTP or
> TCP.
[quoted text clipped - 26 lines]
> >
> > Any suggestions?
Chris Lanier [MVP] - 17 Aug 2004 03:20 GMT
One post only.

Signature
NOTE: Replies are to help benefit others in helping
you and reproducing issues, not necessarily for me
to get back to you.
---
> THIS ERROR MESSAGE DOESN'T MAKE A BIT OF SENSE ...
>
[quoted text clipped - 62 lines]
>> >
>> > Any suggestions?
Heidi - 31 Jan 2005 10:47 GMT
I am having the same issue. I have cleared the UDP and it has not made a
difference. Any other suggestions?
> Clear UDP in the Network tab of WMP and that should force it to use HTTP or
> TCP.
[quoted text clipped - 26 lines]
> >
> > Any suggestions?