Problems with Excel 2003 - Dashboards

[Sagu]

Hello Everyone..

I have a dashboard workbook which works fine in Excel 2000.. The
Dashboard has lists which control the data which is being fed into the
graphs.. Based upon the level selected the data is varied and hence the
graph varies.. Normally the time taken is very miniscule.. The graphs
get updated almost instantly.

My organisation has migrated to Excel 2003 and the same dashboards now
take lot of time to render the graph.. If theres a change in the list..
the graphs get updated only after 3-5 minutes..

Can anything be done to rectify this?? Can Excel 2003 be customised to
perform within the same time lines as Excel 2000??..

Thanks in advance,
Sagar