Chocolate: condensation issues
There is very little information to go on, but the most likely answer from your description is condensation. Assuming that you kept it in the fridge overnight, then took it out and removed it from the mold, the chocolate will start "sweating" immediately. 

If that's your problem: don't keep chocolate in the fridge. The proper temperature for chocolate hardening is 20 Celsius, try to keep at it as much as possible. If you are too much above, the chocolate can bloom, if you are below, it can condense. If you are not a perfectionist chocolatier, several degrees celsius difference in either direction will still produce a good enough result, but a fridge is always bad.