What version of Premiere Elements and on what computer operating system is it running?
How are you trying to get these presumed wav files into Premiere Elements?
Have you explored transferring the audio from the recorder to the computer hard drive save location?
And, then import the audio into the Premiere Elements project with Premiere Elements' Add Media (or Get Media)/Files and
Depending on your recorder/computer connection and an associated computer drive, you might consider
Video from Flip or Cameras
and in the Video Importer dialog
.....Source = associated drive
.....Save In = designated save location for the file
.....check mark next to Add To Timeline if you want the file in a project at that time
.....select the thumbnail for the file
.....click on the Get Media button of the Video Importer
Please review and consider and supply more details so that we can fine tune (customize) the reply.