Basic web based accounting packge

Hi I already have basic website [login to view URL] I need to add a web based basic accounting to it so that I can do accounting entries for my clients online with a login. My clients should also be able to view / edit / print the trascations / reports / details via their log in. Want it as simple as possible, should be able to do basic accounting functions such as entries, generate Profit and loss and balance sheet, cash flow and stock reports. Kind Regards Sai