Not able to select the table (adding one more table to the connection)

hi.

Plz have a look on below image..

I am Facing one problem ie.

I Develop a small Report simply it is having 4 tables.

Everything is fine.

but today as per my requirement i need to one more tables..

then i open my connection and again select new table and try to add the selected tables list.

in Selected tables list.

one more connection is added

Previously..

I8IT-PC

TABL1

TABL2

TABL3

TABL4

BUT NOW

I8IT-PC

TABL1

TABL2

TABL3

TABL4

I8IT-PC

TABL5

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AFTER THAN ONE MESSAGE IS COMING LIKE TWO DATA SOURCE ARE CONNECTED LIKE THAT.

AFTER THAT UNABLE TO RETRIEVE THE DATA ERROR MESSAGE IS COMING.

ANY INFORMATION...