Key stuck, no start

[Michel71]

Hi

Volvo V50 2.4 140ch
Year 2008
Automatic gearbox
Engine B5244s5
280 000 km

Some electric problem : fuel gage read 0, but the car is well working. I decide to remove CEM to check and clean. No thing particular. Re install the CEM. After that, starter is working but engine doesn't start... I decide to remove the CEM, ECM and ABS connections to checkand clean. All seams to be OK.
Now, nothing is working... The key can select positions I, II and III, but not 0. I can’t remove the key.
ECM, CEM and key has been sent to Xemodex, all is OK. No problem found..

How to control the ignition switch ?
Any others ideas about my problem ?

Thanks for help
Have a good day.