GHS DBGBL-Boomers

Bought two sets these as a replacement for the ones that came with the Steinberg Spirit GT-Pro, they are too short and took some effort to put the D string, after tunning it the sound came weak and the E,B and G strings ware unable to keep the tuning, put the original strings back in the guitar and everything is fine, didn't bother to return these, but I'm afraid to use the other set that I bought. After using the 2nd set of strings I have the same result, the neck ball on the high E unwonund and I'm unable to use the strings, both sets, avois this strings at all cost, the ones that came withe the guitar were better...