my foreign key is giving null values

Question

 hii,

here i had referred ID as a foreign key which is the primary key of another table.

 

see i will show you my tables

 

   mood table.

 

CREATE TABLE tblmood(

moodid INT PRIMARY KEY IDENTITY(1,1) ,

mood VARCHAR(30) NOT NULL,

ID INT FOREIGN KEY REFERENCES signup(ID)

);

 

   Signup table

 

CREATE TABLE signup(

ID INT PRIMARY KEY IDENTITY(1,1) ,

username VARCHAR(30) NOT NULL,

email VARCHAR(30) NOT NULL,

passwd VARCHAR(30) NOT NULL,

);

 

so , whats the problem is in the mood table i am getting the null , instead the user id from the signup table

 

Someone show me the right direction .

Thanks in Advance