Rx signal level failure values

Hello im felix Alvarado thanks for reading.
Im having a problem(rx signal level failure) with a FXCB Nokia RF in sharing with 2G-3G in 850, the value showed is 1.01,1.10 for rx signal level and it has to be between 1.5 and 2.0.
I Just changed jumpers(6) and the sharing kit but with all new is showing the same problem.

Now some friends are telling me that change the minimun value to 1 and maximun 2 by software, but i know its not the Best solution.

Do you have another thing that i could try to solve the problem?

Thanks alot for reading.