I just refill the yellow ink but it dont print yellow.How should i fix it??

Solution
That's like asking someone how you should "change batteries in a remote because it's not working". Your "question" is too vague and provides zero information on the subject. Here's what you need to do:

1) Describe in simple English the problem you are having, including any steps you may have taken already.
2) Use proper model numbers in 1) above, including the model of printer and type of ink
3) Spend more than 5min on writing the comment, and double check to make sure it is intelligible and has the required information.


That said, the quality of question you posted makes me think this is a printer head problem caused by improper use. If the built in cleaning function doesn't work it's time for a new printer.
That's like asking someone how you should "change batteries in a remote because it's not working". Your "question" is too vague and provides zero information on the subject. Here's what you need to do:

1) Describe in simple English the problem you are having, including any steps you may have taken already.
2) Use proper model numbers in 1) above, including the model of printer and type of ink
3) Spend more than 5min on writing the comment, and double check to make sure it is intelligible and has the required information.


That said, the quality of question you posted makes me think this is a printer head problem caused by improper use. If the built in cleaning function doesn't work it's time for a new printer.
 
Solution