error 0x80010105 the server threw an exception

I am running windows xp with outlook 2002 setup for exchange 2000.  I also have Nextel Desktop assistant installed which enables me to get my email to my cell phone.  Everytime I startup my pc I get an error that says error 0x80010105 the server threw an exception.  I have to right click on the nextel desktop assistant icon in the system tray and exit from the program.  When I reopen the desktop assistant it comes up as being connected and I get my email as I should.  The issue only comes up when I start up my pc.  Nextel claims that the error is coming from our exchange server because it is failing to authenticate my user account.  I question that because if that was the case I would have this problem all day, simply exiting the program wouldn't work.  It is annoying in the fact that every time I start up my pc, after nextel desktop assistant starts, I get the error.  I would like it to stop...Please help!