.net - Can't connect Amazon rds database in Amazon ec2? -

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i have console application has amazon rds connection entity framework . running in local pc. when running application in amazon ec2 can not connect amazon rds database , saying 'the underlying provider failed on open' . connection string of entity framework ...

<add name="myentities" connectionstring="metadata=res://*/yhfinmodel.csdl|res://*/yhfinmodel.ssdl|res://*/yhfinmodel.msl;provider=system.data.sqlclient;provider connection string=&quot;data source=datasourcename,portnumber;initial catalog=databasename;persist security info=true;user id=userid;password=password;multipleactiveresultsets=true;app=entityframework&quot;" providername="system.data.entityclient" />

thanks in advance.

have looked @ security groups? think need add ec2 security group using have port access rds instance.


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