Regardless of the purpose in contacting them, and regardless of whether they help or not. Contacting them is strictly forbidden by God and it is evil to do so.
Yea, well, God says not to eat pork, and to kill old woman who dabble with supernatural forces, and that marrying my niece isn't incest, and that it's a good idea to deliver the virgin 10 year old daughters of neighbors you've invaded and slaughtered into slavery. It's possible that a rational person might not consider this an irresistable argument.