<?PHP
if ($SubmitCustomer=="Submit Information"){
if ($addressinput){
?>
<FORM METHOD="POST" ACTION="add_address.php">
</FORM>
you made a mistake here(one extra </form> is their).
try the following..
<?PHP
if ($SubmitCustomer=="Submit Information"){
if (isset($addressinput)){
?>
<FORM METHOD="POST" ACTION="add_address.php">
<TABLE>
<TD></TD><TD>Flat Number</TD><TD><INPUT TYPE="text" NAME="address[flat]" SIZE="4" TABINDEX="9"></TD></TR>
<TR><TD></TD><TD>House Number</TD><TD><INPUT TYPE="text" NAME="address[house]" SIZE="4" TABINDEX="10"></TD></TR>
<TR><TD></TD><TD>House Name</TD><TD><INPUT TYPE="text" NAME="address[name]" SIZE="40" TABINDEX="11"></TD></TR>
<TR><TD></TD><TD>Street</TD><TD><INPUT TYPE="text" NAME="address[street]" SIZE="40" TABINDEX="12"></TD></TR>
<TR><TD></TD><TD>District</TD><TD><INPUT TYPE="text" NAME="address[district]" SIZE="40" TABINDEX="13"></TD></TR>
<TR><TD></TD><TD>City</TD><TD><INPUT TYPE="text" NAME="address[city]" SIZE="40" TABINDEX="14"></TD></TR>
<TR><TD></TD><TD>County / State</TD><TD><INPUT TYPE="text" NAME="address[county]" SIZE="40" TABINDEX="15"></TD></TR>
<TR><TD></TD><TD>Post/Zip code</TD><TD><INPUT TYPE="text" NAME="address[postcode]" SIZE="10" TABINDEX="16"></TD></TR>
<TR><TD></TD><TD>Country</TD><TD><INPUT TYPE="text" NAME="address[country]" SIZE="30" TABINDEX="17"></TD></TR>
<TR><TD></TD><TD><INPUT TYPE="reset" VALUE="Clear Form"></TD><TD><INPUT TYPE="submit" VALUE="Submit Address" NAME="SubmitAddress"></TD></TR>
<TR><TD></TD><TD><FONT COLOR="#FF0000">* is required information.</FONT></TD></TR>
</TABLE>
</FORM>
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SR -
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