Can we use the same sql database with two programs? I am on a hosting account which provides only one sql db. I was trying to use the same db for phpbb and link management. But it doen't seem to work well. There seem to be quite some errors in the link management program.
Is there something wrong with the code or using the same db for two tasks is not possible?
Any help will be appreciated.

You can as long as you name the tables differently. I know that phpBB lets you specify a "table prefix", so prefix them with 'phpbb_' (for example) and it should be fine.