Sqlite foreign key mismatch error

Hello there,I have written the following code for sqlite,I have also switched ON my foreign key and my previous foreign key references are also working , but in this code I am unable to figure out the error, the code is right but it's not accepting my values.

    CREATE TABLE "customer_master" (
 "cust_initial" CHAR(1) ,
"cust_slno" INTEGER(6) PRIMARY KEY  NOT NULL ,
    "cust_name" CHAR(40)  ,
"cust_add1" CHAR(40)  ,
"cust_add2" CHAR(40)  ,
    "cust_add3" CHAR(40)  ,
"cust_pincode" CHAR(10)  ,
    "cust_city" CHAR(15)  ,
"contact_person_name" CHAR(30)  ,
    "contact_person_number " CHAR(20)  ,
    "state_code" CHAR(2), 
FOREIGN KEY (state_code)  REFERENCES state_master (state_code));




    INSERT INTO "customer_master" VALUES ("A","3","Arvind Kejriwall","5387-N","Kaushambi","Delhi","94830","Delhi","Nitish Kumar","9214809545","UP");

    INSERT INTO "customer_master" VALUES ("A","931","Anuj","37-L","Vaishali","Delhi","56752","Delhi","Yadav","735657832","DL");

    INSERT INTO "customer_master" VALUES ("L","29","Lakshay","5532/I","Andheri","Punjab","9545","Punjab","Mehta","2736252513","PJ");


    CREATE TABLE "order_header" (
    "order_no" INTEGER(8) PRIMARY KEY  NOT NULL ,
     "order_creation_date" DATETIME, 
    "order_status" CHAR(4),
     "customer_ref_no" CHAR(40), 
    "customer_ref_date" DATETIME,
     "order_value" INTEGER(11),
     "material_required_date" DATETIME, 
    "customer_initial" CHAR(1),
     "customer_slno" INTEGER(6), 
    "delivery_challan_no" INTEGER(8),
     "shipment_date" DATETIME, 
    "invoice_number" INTEGER(8),
     "invoice_date" DATETIME, 
    "transporter_name" CHAR(40),
     "plant_code" CHAR(4),
     "machine_installed_by" CHAR(40),
     "cheque_no" CHAR(15), 
    "bank_name" CHAR(15), 
    FOREIGN KEY (customer_initial,customer_slno)  REFERENCES customer_master (cust_initial,cust_slno),
    FOREIGN KEY (plant_code)  REFERENCES plant_master (plant_code));

When I try to INSERT any value in order_header , Sqlite always shows foreign key mismatch error for custumer_master. Pls help !!! :(