You might want to try upgrading to the newest version, 12.5. It's actually free for you being that you've got Version 11 or higher. Do me a favor please and do the following:
Please UN-install ALL versions of WMR and WINCAP from your computer (the easiest way is through start/control panel/add-remove programs).
Once they're un-installed, please download and install WMR 12.5
Please download it from the following URL:
Wm Recorder 12.5 Download
Wincap should download automatically as a part of this process.
On another note, after you do this, specifically..Can you please provide me with the URL of the video you're trying to record, so I can trouble shoot the issue?