diff --git a/erpnext/accounts/doctype/payment_request/payment_request.py b/erpnext/accounts/doctype/payment_request/payment_request.py
index ccc2b3a..6d1ea97 100644
--- a/erpnext/accounts/doctype/payment_request/payment_request.py
+++ b/erpnext/accounts/doctype/payment_request/payment_request.py
@@ -52,7 +52,7 @@
 			si.submit()
 	
 	def send_payment_request(self):
-		self.payment_url = get_url("/api/method/erpnext.accounts.doctype.payment_request.payment_request.generate_payemnt_request?name={0}".format(self.name))
+		self.payment_url = get_url("/api/method/erpnext.accounts.doctype.payment_request.payment_request.generate_payment_request?name={0}".format(self.name))
 		if self.payment_url:
 			frappe.db.set_value(self.doctype, self.name, "status", "Initiated")
 			
@@ -153,7 +153,7 @@
 		pr.submit()
 		
 		if args.cart:
-			generate_payemnt_request(pr.name)
+			generate_payment_request(pr.name)
 			frappe.db.commit()
 		
 		if not args.cart:	
@@ -199,12 +199,18 @@
 	}
 	
 @frappe.whitelist(allow_guest=True)
-def generate_payemnt_request(name):
+def generate_payment_request(name):
 	doc = frappe.get_doc("Payment Request", name)
-	if doc.gateway == "PayPal":
-		from paypal_integration.express_checkout import set_express_checkout
-		payment_url = set_express_checkout(doc.amount, doc.currency, {"doctype": doc.doctype,
-			"docname": doc.name})
+	if doc.docstatus not in [0, 2]:
+		if doc.gateway == "PayPal":
+			from paypal_integration.express_checkout import set_express_checkout
+			payment_url = set_express_checkout(doc.amount, doc.currency, {"doctype": doc.doctype,
+				"docname": doc.name})
 	
-	frappe.local.response["type"] = "redirect"
-	frappe.local.response["location"] = payment_url
+		frappe.local.response["type"] = "redirect"
+		frappe.local.response["location"] = payment_url
+	else:
+		frappe.respond_as_web_page(_("Invalid Payment Request"), 
+			_("Payment Request has been canceled by vendor"), success=False, 
+			http_status_code=frappe.ValidationError.http_status_code)
+		
\ No newline at end of file