it happened to me 3 weeks ago when i applied for my sister. Our company PRO advised me to come to immigration office to check the problem. i discovered that my application was disapproved due to some reasons they will not going to disclose to you. they only told me that i am not qualified to sponsor my sister. But then, i asked help from our company PRO, he went to immigration and ask help from his friend inside and my application was appoved! Now my sister is coming next week.