Center Post stuck on ViVi tank HELP!!!

[gramakittycat]

I have a ViVi tank that I believe the wire to the bottom needs to be re-soldered but I can't get separate the post from the base ! I have another one that came apart when I pulled the base off .Please any suggestions?! Thank you

 

[Yves]

Not following your problem could you post some pictures please

 

[gramakittycat]

Fixed! Thank you!