I am using office 2003 and merging a large excel
spreadsheet into a word document.  

I have used mail merge several time before with no
problems with the datasources.  However this time I am
using an excel spreadsheet which takes up alot of memory.
When I use the mailmerge wizard to select the source I get
to the point where I choose the worksheet I want and click
ok.  Then nothing happens - no error warning or anything.  
When I try to merge with the same excel file but select a
tab with a much smaller amount of data in I can merge that
fine. Is this likely to be caused by the large size of the
particular worksheet?  If so can anybody tell me the size
limit and anyway workaround other than splitting up the
worksheet?

Thanks,

Lisa