SQL & PL/SQL

Hi All,

I have a procedure that checks all the URLs in specific database columns to ensure they are correct. Everything works fine unless the URL is an Oracle Portal URL (internal or external) or an Application Express URL (internal). When the program hits these two, I receive the following error:

ORA-29274: HTTP request failed
ORA-06512: at "SYS.UTL_HTTP", line 1231
ORA-29268: HTTP client error 406 - Not Acceptable

Database Version: 10.2.0.4.0
Oracle Portal Version: 10.1.4.2.0 (Build: 197)
Application Express Version: 3.2.0.00.27

We do not use proxies

A sample Oracle Portal url would be:
http://www.msic.dia.mil/portal/page/portal/myportal_page/System_Page?p_type=XXX&p_user=qwerty

A sample Apex URL would be:
http://www.msic.dia.mil/pls/apex/f?p=101:1:1234123412341234::::P0_USER,P0_ID:qwerty,1234

Code snippet:
Declare
v_html VarChar2(2000);
Begin
For i In (Select id, url
From my_table
Loop
v_html := Null;
If i.url Is Not Null Then
v_html := Substr(Utl_Http.Request(Utl_Url.Escape(i.url)),1,100);
End If;
End Loop;
Exception
When request_failed Then
Utl_File.Put_Line(v_out, 'Error: request failed: '||sqlerrm);
When init_failed Then
Utl_File.Put_Line(v_out, 'Error: Init failed: '||sqlerrm);
When Others Then
Utl_File.Put_line(v_out, 'Error: Other: '||sqlerrm);
End;

It is hitting the Other Exception.

Thanks so much in advance!
Becky