ERROR

 

I have trade for 0.1 doller and meta trader set the trade 3.0 doller 

this is the problem in meta trader 4 

 

Metatrader can not set the trade by 3 lot if you open the trade by 0.1 lot.

Seems, you are using EA (bad coded EA), or you subscribed to the signals with lot size calculated in automatic way.