hi i seem to have a problem with iTunes home sharing

before the lastest upgrade of itunes and ios 6 my home sharing worked like a treat all music i had on itunes (373 albums) would play on my iphone in the kitchen in its little speaker dock, however since upgrading to ios 6 and itunes 10.7 i can only get 150 of my albums to be recognised on my iphone 4 when connecting to my computers libary, was just wondering if anyone would know why this may be?