I was S, and the bidding preceded:
1S 1NT
3C 4C
4D 5C
All pass
After cashing their 3 top tricks at the start, we were off 1. 4S is cold.
Opposite the 2 red aces, 7C is cold. Hence I made a slam try in clubs rather than just bid 4S. Partner said that she had no other bid to make, since she had 5 card club support.
Were we just unlucky, or should someone have done something differently?

Help
