ActionScript 3.0 :: Data Validation Submitted By User

We are using Hibernate, BlazeDS and Flash Builder 4.0 for Application development. We have a problem in Data validation submitted by User. We have a Employee table. We need to enter the EmployeeId and Name in the form. We need to have two levels of validation. One is to check the user entered proper text which can done by validator components. The Second one is to check whether the Entered Id is already existing or not.

After checking the validation we will insert in the Database Table. For the second one, We have created a method in Hibernate and referring through BlazeDS. Now our problem is, In our Action Script we are passing the entered data into the Method and getting the return value. Depending on this we are inserting. The subsequent code is getting executing before getting the return value. Our code as follows:

Code:
protected function empIdCheckResult_resultHandler(event:ResultEvent):void {
IdCheck.text = empIdCheckResult.lastResult;
} btnSubmitClick() {
empIdCheckResult.token = opteDestination.empIdCheck(dgEmpId.text);
idCheck.text = empIdCheckResult.lastResult; /* This step taking time, setting the Variable after some time and the Script executing next step in the code*/
if(IdCheck.text != "0") {
//Some Function
} else {
// Some function
}}