Problem-Error with TDC manual data

[Mysanthropus]

I always try to get a torpedo solution by entering manually all the data in the targeting map. I enter bearing, range, aob and speed and i click the button to get the solution and autoupdate. The problem is that after installing sh3 and GWX this way of getting solutions is not more valid cause if i enter datas and 2 minutes later i try to enter latest datas of range (for example) in order to obtain a most accurate solution the TDC give me the same old solution and i can't change it again. The result is that even entering new and diffrent datas in tdc manually, when i click on button always get the first and old solution i got at the begining.

Anybody had the same problem or knows the reason of this "bug" ?

I play with only manually entering data and weapon officer (just to identify targets)

Thanks for your help