Welcome to the forum.
Knowing that these are RGB and 8-bit Color is helpful, as that eliminates two likely causes for the issue.
The other common tripping point is whether the JPEG's are Progressive (used to incrementally display the image on a Web site). They should NOT be.
Also, what are the pixel x pixel dimensions of the JPEG's. If they directly from a newer digital camera, they are likely much too large for PrE and for video production. This ARTICLE will give you more background, plus tips on Scaling.
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This is a user to user forum so Adobe won't hear you. If you want to contact them directly use their links at the top of the page.
For a quick start check out the free tutorials at http://muvipix.com
and at Adobe:
The Adobe "Classroom in a Book" line is generally good to teach you the basics as is Steve Grisettis' "Muvipix Guide to Premiere Elements 9" (available from muvipix and Amazon).
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