@morane : Thanks for your valuable time in replying ....

below are my concerns

1)Error says application received from the SAME SPONSER..i wonder how this sponsor is related to on arrival visa...will try applying after 4th January anyways
2) Will they be able to apply if there is already one application from one sponsor
3)Since this is business visa which we are applying through an agency,we are scared to enquire directly as this may create some doubts in them..

More over not many people have committed me for a business visa as it is tough to get for an Indian lady of age 55...hoping for the best...