Employment pass application.

The minimum salary for an employment pass (EP) is S$3300/month.
Thus you will not get an EP, and I doubt you have one now (or was there a mis-typing in your post?).
MoM dislikes job-hoppers, and there are also various other reasons for your new application to be rejected (in which case you'll have to leave Singapore). This is the risk you take when changing job on a work pass in Singapore!

Does it mean that if new in principle was rejected, it will affect my current pass?. I'm audit associate. I think there is demand for the post that's why epass granted

If a new application is rejected while the old pass is still valid, you can continue working in the old job on the old pass.
However, the old employer can see in MoM's system that you applied for a new pass. It is common practise to lay-off such disloyal employees at the next possibility.
Mom also considers your unsuccessful attempts to change job and might not renew your current pass when it expires.