I bet when you're bringing the yarn forward, you're not making the yarn-over. Before a purl, just bringing the yarn forward will give you a plain old purl stitch.
Bring the yarn forward to purl, but then bring it up over the needle and around to the front again to get a yo before a purl.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry