okay! I am not exactly sure, since I don't have the pattern and final product to look at, but here's what I think....
On the Knit side you're going to use ktog and ssk
On the purl side, you're going to use p2tog and ssp
At the beginning of a row, you want a left slanting decrease, so that would be ssk and ssp.
At the end of the row, you want a right slanting decrease, so that would be k2tog and p2tog
That will make your edges look like this: / \
You can check out amy's video's here
Try doing that, and then the PU should/could/might work out (again, i need to see it, so I'm not sure). Are you making the rabit heinie???