BO Report Generation very slow

we have BO XI R2 running on windows 2003 enterprise ed (64 bit) with 8 GB ram and oracle 10g db. the report generation time for a simple statement takes about 40-50 minutes. what are the likely cause ? we have 5 named user licence and our branch personnels are accessing through infoview. the login is very fast.

further can we configure the infoview to generate reports directly in PDF format since we are currently generating the report and then again selecting the view in PDF mode to print. this also takes considerable time.

best regards