1) Make sure your tires are hookless compatible
2) Unmount the tires, clean your rim beads thoroughly (old sealant can be dried up / pasty), and mount them again.
3) Make sure you put enough sealant. I think 1oz is the recommended amount, but I always put 2.
Not sure why you remove your valve cores - I never do this. I don't need a compressor, a floor pump is OK. However, I know that some TL tires & rim combo are a PITA to mount properly. My former setup was like this. Getting new and better quality TL tires solved everything.