I've changed out the single control Kohler cartridge, however, the mixer at the bottom now leaks only while the water is on. What am I doing wrong?

I've changed out the single control Kohler cartridge, however, the mixer at the bottom now leaks only while the water is on. What am I doing wrong?

Is this the cartridge that you changed out? Do you have any details that you can give me? Regards, Tom

It is similar, but not exactly the same... more pcs, including a "flange-type" PC that holds the cartridge in place w/screws... thanks for your response. Nilmeier

It is similar, but not exactly the same....more pcs, including a "flange-type" pc that holds the cartridge in place w/screws....thanks for your response. Nilmeier What valve are you working on? Kitchen sink? Tub/shower? What?? Tom

It's a shower. Thanks