What version of Premiere Elements do you have, what computer operating system is involved?
What do you want to do - DV or HDV capture firewire into the Premiere Elements Capture Window? If so, you cannot do that with Premiere Elements 13/13.1 and 14 (latest version). Adobe has removed this feature from those versions. The last version that has this feature is Premiere Elements 12/12.1.
Please refer to the Adobe document which describes the situation and where it offers workarounds. This document applies to both 13/13.1 and 14.
You could also consider using another program for the captures and then importing the captures into Premiere Elements with Premiere Elements' Add Media/Files and Folders. Example of other programs on Windows -
HDVSplit HDVSplit 0.77 beta
Please consider. Any questions or need clarfication on the above, please do not hesitate to ask.