well i hv this guitar its an old junk (classical but smaller then the regular type) , so I thought i fix it and jam alil ,so i got those nylon strings for it and it worked just fine , i tuned it but when it comes to the high E , it loses tune just by picking it once and the more i pick the more it loses tune, so i thought maybe I put the string in bad way so started all over again but the problem never gone away plz some one help me with this .thx in advance