create two foreign key from one table sql server

i am creating user table like code PK Table

CREATE TABLE TblUser (UserId int identity primary key ,Name varchar(20))

AND creating one more table FK Table

CREATE TABLE TblAnnouncements (Id int identity primary key ,Announcements 
varchar(20),CreatedBy INT FOREIGN KEY REFERENCES TblUser (USERID)  ON  DELETE  
CASCADE, UpdatedBy INT FOREIGN KEY REFERENCES TblUser (USERID)  ON DELETE  SET NULL)

i am getting this error

Msg 1785, Level 16, State 0, Line 1
Introducing FOREIGN KEY constraint 'FK__TblAnnoun__Updat__60A75C0F' on table 'TblAnnouncements' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.

how to maintain createdby and updatedby in an table....

can you give suggest me any other way to do that ?

thank u.