Blocked until not response

My customers is used report budget table and budget statement(customized) to run, Report have trigger to write update or delete table in each department. In alway ,Some users can’t call report and not response before. Because them blocked by someone who used CPU time to process runing about CPU time: 12310844, Memory: 51696,Physical I/O: 17755 I want to know : 1. What’s cause be someone not response to run report budger ? (H/W or S/W) 2. in Coding customized don’t have code Lock table but have trigger update 3. concurrent users used budget about 40 users in same time. 4. Is posible to update hot fix for solve this problems ? 5. How can I do performance better ? P.S I used Navision 3.6 Thank you so much Suebsant