iops parameter issue

gistfile1.txt

Here are the params being passed:

  { "ParameterKey": "MysqlDBAllocatedStorage", "ParameterValue" : "250" },
  { "ParameterKey": "MysqlDBIOPS", "ParameterValue" : 2000 },
  { "ParameterKey": "MysqlDBInstanceClass", "ParameterValue" : "db.m3.xlarge" }
  
Here's the parameter declaration:

    "MysqlDBIOPS" : {
      "Description" : "Number of IOPS to provision; 1000 increments per 100GB allocated storage",
      "Type" : "Number",
      "MinValue" : 1000,
      "MaxValue" : 10000
    }
  
Here's where the params are being consumed:

    "RDSMysqlCluster" : {
      "Type" : "AWS::RDS::DBInstance",
      "Properties" : {
        "AllocatedStorage" : { "Ref" : "MysqlDBAllocatedStorage" },
        "AllowMajorVersionUpgrade" : false,
        "AutoMinorVersionUpgrade" : false,
        "BackupRetentionPeriod" : "7",
        "DBInstanceClass" : { "Ref" : "MysqlDBInstanceClass" },
        "DBParameterGroupName" : { "Ref" : "RDSMysqlClusterParameterGroup" },
        "DBSubnetGroupName" : { "Ref" : "RDSDBSubnetGroup" },
        "Engine" : "mysql",
        "EngineVersion" : "5.6.17",
        "Iops" : { "Ref" : "MysqlDBIOPS" },
        "MasterUsername" : { "Ref" : "MysqlDBMasterUsername" },
        "MasterUserPassword" : { "Ref" : "MysqlDBMasterPassword" },
        "MultiAZ" : true,
        "Port" : { "Ref" : "MysqlDBPort" },
        "VPCSecurityGroups" : [ { "Ref" : "DBPrivateSecurityGroup" } ],
        "Tags" : [
          { "Key" : "Name", "Value" : { "Fn::Join" : [ "-", [ { "Ref" : "AWS::StackName" }, "mysql" ] ] } },
          { "Key" : "VPCGroup", "Value": { "Ref" : "VPCGroup" } }
        ]
      }
    }
  },