Are you sure they are not gripping - or are the strings still just stretching? If hey are not gripping, put a little violin rosin on the pegs, and they will grip. Friction pegs are actually better than planetaries for nylon or nylgut strings - you need to turn the planetary pegs too much for the equivelant change of pitch. I have nylgut banjos strung with both types of pegs, and from my experience, these pegs you have now are the best kind for this type of string.
The Banjo Hangout myHangout photo albums were created to allow members to post photos which 1) they own the copyrights to, or 2) which are non-copyrighted. Please respect others by not posting their copyrighted images. Photos posted in violation of this notice may be removed by the webmaster without prior notice, and may result in a locking of your myHangout account. Read complete copyright policy.