Donna,
This was a bug in 6.0. It was fixed in 7.0, but if you're using 6.0 you'll have to work around it, unfortunately. The link below discusses this issue and has a workaround at the end:
Luis
NI
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000000080000004D670000&UCATEGORY_0=_318_&UCATEGORY_S=0&USEARCHCONTEXT_QUESTION_0=%22Start+In%22+distribution&USEARCHCONTEXT_QUESTION_S=0