Installed Fonts Not Showing Up In Photoshop

[GoodPeopleFlags]

Well, the subject line pretty much says it all. I have to use certain fonts for a job - 4 types of Rotis Semi Sans - regular, bold, extra bold, & italic. I have them all installed but only the regular and Italic are showing up in Photoshop. They're all there in Corel and Omega.

I would really like to be able to use them in Photoshop due to the nature of this job.

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[Rodi]

Did you check the box next to the font name with the variants?