Read above; the third reply: it was a usefull one :)

And I didn't post another useless one to say "eh! I've already gave you the clue!"

Then, another sentence:

Before posting something new, read the answers people took time to give you.

And finaly (and because I'm a better guy than you might think) I'll give you another clue:
alphatransparency (alphalevel)
instead of grdtransparent

Then, the final word:
There's usually a doc coming with modules