Hi Wee Ivan,
SAP Solution manager version 7.1 is supported since ARIS 7.2 SP 2, only. I do not know if you are using this SP2 or not, if not you will have to upgrade to current ARIS 7.2 SP2 and SAPJco 3.x, there is no alternative.
See also this FAQ:
http://www.ariscommunity.com/users/sascha-ding/2011-10-30-aris-sap-jco-3-faq
You wil also need latest transports.
You can find the transport request at the ARIS installation DVD or at the ARIS download center.
Hope this information can help you.
Regards,
Hugo Amo