capital letters in bbcombotest.cfg

I can operate bbcombotest properly when I use small letters in bbcombotest.cfg, but when capital letters are used in bbcombotest.cfg, the result of bbcombotest is not displayed on bb.html.

[OK] <bbcombotest.cfg> combo-savvis.combo=(bhr1\-pos\-13\-0\.SantaClarasc4\.savvis\.net.conn || csr12\-ve240\.SantaClarasc5\.savvis\.net.conn) <bb-hosts> 0.0.0.0 combo-savvis # noconn

[NG] <bbcombotest.cfg> COMBO-SAVVIS.combo=(bhr1\-pos\-13\-0\.SantaClarasc4\.savvis\.net.conn || csr12\-ve240\.SantaClarasc5\.savvis\.net.conn) <bb-hosts> 0.0.0.0 COMBO-SAVVIS # noconn

Please let me know if using capital letters in bbcombotest.cfg is illegal or not.