Is this an Ajax error?

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I added HoverMenu functionality from the Ajax Control Toolkit to my app and
it works fine in most cases, but for certain fuctions I get the following 2
errors. Can someone tell me what might cause these errors and suggest a way
to fix them?
Thanks
/Ken
====

Webpage Script Errors

User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR
1.1.4322; .NET CLR 2.0.50727; InfoPath.1)
Timestamp: Mon, 23 Jun 2008 21:55:40 UTC

0.
Message: Sys.InvalidOper ationException: Type Sys.Timer has already been
registered.
Line: 701
Char: 49
Code: 0
URI: http://localhost/demo.psts/secure/Ex...st.aspx?f=Find

1.
Message: Sys.ScriptLoadF ailedException: The script
'/demo.psts/ScriptResource. axd?d=z6JKBUgIb R9lVNiaa-VK1A5ZYACMygYsd zhZgCb57H_ZBU1c kC_m8jtzJ4OASCC T-uU0Y1ii2YWZoOUK FEwNPA2&t=63339 8780400000000'
failed to load. Check for:
Inaccessible path.
Script errors. (IE) Enable 'Display a notification about every script
error' under advanced settings.
Missing call to Sys.Application .notifyScriptLo aded().
Line: 3312
Char: 13
Code: 0
URI: http://localhost/demo.psts/secure/Ex...st.aspx?f=Find

[=?Utf-8?B?a2VuIHM=?=]

RE: Is this an Ajax error?

Hey Microsoft guys, can I get an answer -- even if it's "I don't know"?
Thanks