Ok a few suggestions:
Use lowercase for the tags.
Validate your code. Tags must be closed in the same order they were opened.
Attributes should be enclosed in quotes. ie rowspan="2" not rowspan=2.
You open a td tag, then open a form tag and without closing the form tag, you then close the td tag. This is a mistake.
If the form must contain the table contents then the form could enclose the table. Try moving the closing form tag to the end fo the table and the opening form tag to before it.
This code works fine for me in FF:
Code:
<form name="UBICquery" method="POST" action="https://verifyus.entp.attws.com/VerifyUS/Controller?action=UBICResults" target="_blank">
<table><tr><td rowspan="2">
<textarea Rows="4" Cols="31" wrap="virtual" name="IDs" style="background-color: lightblue; color: #0000cc; font-family: arial; font-size: 13;"></textarea>
</td></tr><tr><td align="right">
<input type="submit" value="Convert ID" style="background-color: lightblue; color: #0000cc;"/>
</td></tr><tr><td>
Type of ID to Convert
</td><td>
<input type="radio" name="typeOfIDSearched" value="AWID">AWID <input type="radio" name="typeOfIDSearched" value="CUID" checked>CUID<br />
</td></tr>
<tr><td align="right">
Show Active?
</td><td>
<input type="checkbox" name="showActive" value="yes" checked/><br/>
</td></tr></table>
</form>
If you have the perms then run iexplore <url> to launch Ie even if FF is default.