signatrue help, please

[Super Ali]

Hi guy's
Can someone help my out please
I have made a name and saved it on my PC, when i go onto image magick to make it glitter in having problems
when i uplift it all i'm getting is a big black square i't not showing the name, any ideas

[mlski]

When you put the glitter into your graphic - choose the "In" option - not over