Need a simple modification for mq4 file

I have an Expert Advisor (mq4 file) This only work on normal Broker but not on ECN Style Broker! I always get this error: error Modify SELL order : (131) invalid trade volume so that´s a very simple job, and i need someone who can make this very fast I´ve add 2 mq4 files, one for 4 digits and one for 5 digits, it´s exact the same except the digits!