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Make sue your sheet format path is set properly under Tools > Options > System Options > File Locations
Also check if this post helps: http://www.solidworkstemplates.com/wordpress/?p=30
Read this post for your future reference: Forum Posting
Did you figure this out? I am having the same issue, although I am not using PDM. The only way I can get any sheet format on any sheets beyond the first is to copy and paste the first sheet. It's driving be nuts.