How to find an exact English level?

[Tars]

HI, Im learning english for about 6 year but from 5 years ago till now in every exam i take a part I points about 75-80 percent no matter how much it be difficult (ofcource I mean not very difficult exam), in simple or hard test I Do same. I lost the key for restarting my learning, Can anyone help me out and share exprinces or help me to find my problem and undestand it more
Thanks for all of your help and support
"TA"

[Torsten]

You can find out your level of English by completing this test: http://www.english-test.net/toeic/exam/simulator1/

TOEIC listening, photographs: In the country