may i know the reason they reject?then end up have to pay lawyer fees and cannot transfer the unit?am i taking a high risk to take bumi lot?bcs that unit quite suitable for me and desire to get it...

I have experience buying from Bumi (Is it called Bumi Lot?)

The property is landed Leasehold in Selangor state in 2009, successful after 1st appeal. But took me more than  6 months just to get the land office consent.

Guess you should get experience lawyer to do the appeal for you (The lawyer need to write a long story to convince the land office that the owner seriously and urgently need to sell off the unit and need to provide lots of document to prove it). But need to be patient lah. hopefully my experience will give you guys some indicator that you should expect reject for the 1st application, but chance is always there for your appeal.          

I would say, if the buyer is buying at bumi price, then he need to pay for the transfer.
If the seller want to sell at non-bumi price because he think he can convert to non bumi, then he pay for the cost.

But really very complicate, so in the event cannot be done after appeal and few months, what happen to the earnest deposits/ booking fee?
really need to discuss between both seller and buyer.