Aws credentials issue - #UnrecognizedClientException

Im using aws with boto, and I have my credentials configured in ~/.boto. Everything was worked fine, I was connecting to all servers with sucess.

But now I confiured boto with credentials from other aws account. And now I cant connect to any service, I have always this error (in case of connect to dynamodb):

boto.exception.DynamoDBResponseError: DynamoDBResponseError: 400 Bad Request
{u'message': u'The security token included in the request is invalid.', u'__type': u'com.amazon.coral.service#UnrecognizedClientException'}