I'm putting together my PC but went I went to install it in my case, the screw won't screw all the way into the standoff and therefor the mobo wiggles around and isn't secured. I tried all 3 screw types that came with the case and they all don't work. The screw turns in to a certain point when all that happens after that is the standoff itself is being turned by the screwdriver. Already stripped one hole on the case because the standoff was overscrewed. The manual that came with the mobo has NOTHING on installing the mobo into the case. Mobo is an ASRock H97 Pro4 and case is the Rosewill Galaxy-02.