What am I doing wrong???

[magicman34]

I have a lev 100 Armour PM with lev 19 exp. I badly need some decent armour n weps, so thought lets give making some a go. I found a cresline board and have all the mats, but it says only a 56% chance of making it. She already failed with a brandline, which dropped from 56% to 28% once I said OK make it. No point wasting stuff I could sell and put towards stuff if she aint up to the job.

Anybody got a clue as to where I'm going wrong??