Hi, I have a Lexmark X75 and use the Ink-Tec refill kits from click here
These refill kits are supplied with a cartridge holder so that the contacts are protected all the time. They are also supplied with a rubber connector and special syringe so the ink can be withdrawn through the print head AFTER filling to assist with maintaining the ink flow.
I would have thought that the adhesive from the tape you used would have contaminated the contacts in some way and needs to be cleaned off.
Also suggest that you stand the cartridge on a damp paper tissue or in about 1/4" of hot (not boiling) water to assist in un-blocking the print head. Best of luck.