strange, i had the error that my wallet was 2 weeks behind,... did the "add nodes" configuration, restarted and now it kinda stucked at 3 weeks now

There seems to be a special case that causes the local wallet to stop updating
You may need to remove the blocks folder and reload it
You can download some block data here, which can save a lot of time
https://mega.nz/#!Xy4VCKJR!3VbR-HzV2VDnmNG0tgQTYfa72Gs3EtOsAvugx_e-y5Y