Too many login attempts failed

Hi

I have activated my instance "SAP Business Warehouse 7.4 SP5 incl. SAP Business Objects BI 4.1 SP2 on SAP HANA 1.0 SP7" free version on AWS .

I am unable to login to sap bw 7.4 system , becuase of too many attempt to failed with user id "demo".

could you some one tell me , how to unlock it .

Thanks

Hari