FSUIPC and PMDG setup

Using FSUIPC PRESSES KEYS tab could configure how many switchers (Landig Lights, Taxi Lights, Battery, etc.), with optimal use in various aircraft. 

For the PMDG B738 NGX, I followed the following steps. 

For example for the No. 1 no keypad, operate the Landing Lights. 

a) In the FMC I deleted the default mapping and indicated that option (No. 1) 

b) In the FSUIPC, PRESSES KEYS tab, I select key 1 (non-key) and indicated that this key will operate as ON and OFF for landing lights, drop down menu for each case. Indicating parameter 0 for OFF and 1 for ON. 

Result: the respective switcher (Landing Lights) in the Overhead Panel turns on and off until I return permanently tighten the No.1 key. 

How I can fix this? 

The proper functioning should be, activated key N ° 1 = on landing lights. Off N ° 1 = landing lights off key. 

From already thank you very much for any help you can give me. 

 

P / D. I have "walked" several hours and countless websites, unable to see a solution. Clarified that also deleted the file FSUIPC.INI to leave "clean" program. I have paid and registered version of FSUIPC.