Blastech.. yep, it sounds like a couple possible things either the tape was too strong and pulled the paint off, or you pulled the tape off when the paint was fully dry, which is a NO NO, causing the new color to peel off.
Big question???? Did you pull the tape of when the red was fully dry? because that could be a big problem as well.
One thing to remember when doing a multi layer paint job is to always pull the tape off while the paint hasn't fulley dried yet of the color that was just sprayed.
The obejective is to avoid what you just went through, the paint will still be soft and "shouldn't" pull off like what happened when you peeled the tape off.
If the paint has fully dried with the tape on it, score the tape edge with an exacto knife this will cut the paint thus allowing the tape to pull free without peeling the color off..
These are tips from modeling books that will save you headach.
Another thing to try is useing the Blue masking tape, it's glue is not as strong as regular masking tape and works like a charm.