I created a custom object called Impressions. Every time a Opportunity Product is created with a Product Family = Impressions I would like copy some fields from this Opportunity Product and insert them into a new row on the Impressions object. 

For example if I add an Impression Product to an Opportunity with the Quantity of 50 and a Date of 6/1/2013, I would like a new row to be created in the Impressions object with ID = 1 (Autonumber), Quantity = 50, and Date = 6/1/2013.

Here is the code that I have. It is not triggering any errors. I have placed the trigger in the Opportunit Product triggers, and it is active; however, when I create a new object to see if it works, it does not. Can anyone offer any assistance?? I think the code is OK, but maybe I'm missing something?? Your help is EXTREMELY appreicated!

trigger createImpression on OpportunityLineItem (after insert) {

List <Impressions__c> impToInsert = new List <Impressions__c> ();

for (OpportunityLineItem o : Trigger.new) {

// Check if Opportunity Product Meets my criteria
if (o.Product_Family__c == 'Impression') {

Impressions__c i = new Impressions__c (); //Instantiating new object to put values for future record

// Mapping Opportunity Product fields to new Impressions object

i.Bill_Date__c = o.ServiceDate;
i.Expected_Impressions__c = o.Quantity;
i.Predicted_Revenue__c = o.TotalPrice;
//Adding new object to list that will be inserted. 

impToInsert.add(i);

}

}

//Loop has finished; Inserting new records in SF
try {
insert impToInsert; 
} catch (system.Dmlexception e) {
system.debug (e);
}

}
 

 Thank you!