Ok here comes my try:

Whatever Your opponent plays it is EVERY TIME -EV!!!

Your opponent has 6 chances of having AA. If he calls all the time You have an EV of -198,89 then ( 305 risk and a chance of round about 15% of winning 705 ( 400 net profit ) ).

Your opponent has 16 chances of having AK. Your EV if he calls all the time here is -120,65 ( 305 risk and a chance of round about 26% of winning 705 ( 400 net profit ) ).

He has also 18 chances of having JJ-KK. Best thing for u would be a fold from him and a profit of 155 ( the whole pot without risking Your 305 ). So if he folds all the time this makes an EV of 155.

If You calculate ( -198,89 * 6 + (-120,65) * 16 + 155 * 18 ) / 40 ( which is the number of possible hand combinations on his part ) this would give You an EV of - 8,34.

If Your opponent will call You x% of the time then Your EV will be even worst. If he calls You ALL THE TIME having JJ-KK then Your EV would be -132,99.

All calculations are done without taking rake into account.

Do I have an error or is this correct? Don´t know...