Disable mouse cursor on pcsx2 standalone

Hi, there is no way I can disable the mouse cursor on pcsx2 standalone. The option is enabled but the cursor is always visible. I tried removing the default frame so as to have the internal screen but the problem persists! If I start the emulator without using retrobat, it works normally and the cursor is no longer seen. I use a sinden lightgun and would like the cursor to disappear. How can I solve it? Thank you!