For you new bow....crush some of the rosin VERY VERY FINELY and then put that on your bow....A LOT at first and you'll have that bow working just fine. I have a little bowl and wooden poi pounder that I've crushed that into and just put it on by my fingers until it SQUEEKS and then I know it's ready to play. aloha, irene
A new bow that has never been used yet needs to be rosined. Did your new psaltery come with a block of rosin? If the rosin is also new, you will need to scratch across the rosin surface a little, then just stroke your bow across the rosin block several times. This gets the bow hairs properly prepared to vibrate the strings when drawn across them. New unrosined bow hairs will do just what you described, slide across the string without a sound. If you don't have any rosin, any music store carries it. Don't worry that it's not "psaltery" rosin; violin, cello, will all work just fine.
Good luck and Merry Christmas to you, too, Bob.
Thank you both for your help.