Hi Cheulmen,
So from the log you posted I see you are trying to sell ETH 0.97895252.
Can you please post what is your ETH balance ?
The one logged is converted to BTC, so I can't tell from the log file.

The error insufficient fund is returned from the API broker call, so if the plugin sends correct data to the API (quantity=0.97895252&rate=0.04086046) not sure what else could be.

Maybe another test you can do is try to sell ETH 0.97895252 at a rate out of the money (so the order doesn't get filled) on Bittrex web site and see if you get the same error or not.

I don't have funds on Bittrex right now. I will do a test as soon as I have some.

Cheers