Yeah, im having the same issues in my current game. I think its down to the AI sussing out my tactics. I've had a very successful run with one tactic, but now im drawing against teams i should be trouncing ! The morale of my players is good, defence nice and tight but attack is having zero success. So ive tinkered with my tactic slightly, formation change mostly and i will let it play a few matches to see if things improve.
Your problem could be completely different to mine, but as themadsheep2001 says - we need to see more details regarding your tactics/formation/players etc;
Regards.
Steve