I sometimes find reports take longer to run - you need to tune/optimise reports just the way you'd tune any other sql - try setting the reports to generate/create themslves so you always read a cached report - much quiicker.
[font="Comic Sans MS"]The GrumpyOldDBA[/font]
www.grumpyolddba.co.uk
http://sqlblogcasts.com/blogs/grumpyolddba/