Yes, I will try this, thanks...
I rewrited some functions, and I hope it will work as I need
//EDIT
E, what tileEntity did you mean ?
the power interface or machine ?
///EDIT
More explanation: If I set the Energy to 100 in the TE_PowerInterface it works, but I cant do any operations with it:
It means: transfering and receiving energy... If I try to set the block energy when is placed ( .setEnergy(100) ) it dont work ...