Something is blocking or interfering with it or your keyboard has a stuck key. You may have to try and windows clean boot to determine the cause of the problem.
Not sure if this helps any but here is what the log says, as I'm having the same problem. Only trainer I've had a issue with in over four years.
<12:30:23> [PROCESS]: Found game
<12:30:23> [PROCESS]: Version: 2.03
<12:30:23> [PROCESS]: Version(2): 2.03
<12:30:24> [TRAINER]: Activating...
<12:30:25> [TRAINER]: Successfully activated
<12:30:25> [PROCESS]: Unable to read from memory<12:30:25> [PROCESS]:
Unable to read from memory<12:30:25> [PROCESS]: Unable to read from memory<12:30:26> [PROCESS]: Unable to read from memory<12:30:26> : Closed!