As already stated, you can't request/use sigs unless you are a paid member.
I'm going to close the thread, but if you purchase a premium or lifetime membership I'll be more than happy to open it back up for you.
“Anna, my strong, terrifying Anna.” -Cas
"You lack the testicular fortitude to study under me" -Elodin
“slow and drunk is no match for fast and scared shitless.”-Jacob