I could use some help on determining what is wrong with this code. I get the following error message:

Error at line number : 1 
Number of arguments mismatches

if(Time_Sheet_Entry [ID == input.Employee].count() > 0)

{ 

x = Time_Sheet_Entry[ID == input.Employee ]; 

//input. refers to fields in current form 

input.Employee_Name = x.Full_Name; 

input.Status = x.Status; 

input.License_Level = x.License_Level; 

}

Thank you in advance for your advice.