The original ringing extension was ringing on the first place, is not the pickup button that makes that extension to ring as it was ringing before, right? Maybe pickup stopped working for you, perhaps for the reason I mention (about the call pickup application change in behaviour where you can only pickup calls from the same dialplan context).
If you use fop2 beta, that nuance is solved by using the PICKUPMARK variable to match the ringing extension disregarding the context.
Anyways, if that is the problem, you will see in the Asterisk full log a line entry saying that it cannot find any mathing channel on contexto FOO or whatever. You have to look at the asterisk logs now, not at fop2 logs.
I am sorry that now your config is broken again.. I helped you for free the other day, left you with a full working seteup. And if fop2 config is the same, it should still work. But it was not the same as it seems you changed the context to from-internal, etc. And this endless list of logs and post is nothing but confusing really.
Please try to look at the asterisk logs, and try to find the corresponding log lines that will point you in the right direction to fix the problems you are having. You might want to use the fop2_server from the beta that is available for your platform and try the pickup again, but before doing blind moves, you might want to check the logs and find the corresponding errors or warnings there... maybe it is not that problem but another asterisk misocnfiguration.
Best regards,