license agreement not accepted error with rational updater

Anyone have this problem?  I installed wdsc 6.0 on 3 pc's in my office.
First 2 installs went fine.  Third is having a problem with update; when
license agreement displays, OK button is not highlighted and I can;t
find a way to click it.
 
thanks for any help!

Tim Swartz 
The Farmington Company 
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