Welcome to IW, Decree [img]graemlins/happywave.gif[/img]
As Marty said, we need details before we can tinker.
But as a general guideline, you can't go wrong with two warriors, one wizard, two priests, and a thief. I like to multiclass or dual class some of them to increase their usefulness (like the thief).
Give us a general idea of a proposed party, or one that you've tried that isn't working for you, and we can overwhelm you with suggestions for making it better.