Student visa rejected by ICA- Swedish international student

As the headline says, I have today received a rejection letter by the ICA. The application was lodged on my behalf through the private institution that I will study in.

I haven't gotten any reason for my rejection, however, after taking the matters into my own hands and calling ICA from Stockholm I have been told that I should write a letter to ICA and explain why I want to study in Singapore.

Personally, I think it was rejected due to two reasons:

1. My Swedish birth certificate was issued by the national tax agency in English with a signature by an employee. Normally this should suffice but I think ICA rather wants an authentic translation done by an authentic translator even if the English document is issued by the correct government body, they rather would have an authentic translator give their seal of approval.

2. In the application, I also explained all the university costs, as well as my living expenses, would be taken cared of by the Swedish national board of student aid. I even cited my monthly stipend as well as the tuition payment amount.

Maybe in Singapore, this is unheard of and they rejected this too?

Mind you, I nor my parents have never been to Singapore before. So I'm kind of surprised about the rejection. How often are second attempts successful?

My study is 3 years long if I get the student pass and it commences in the 1st of July.