Hi Jaelene,

I know that we as a oversea physiotherapist need to reasses our qualification
You don't. They will do this.

whether they accept degree certificate from Scotland and my diploma from Malaysia
They will accept the Scottish degree for you to apply for registration. As it is a 4 year degree, you can apply for equivalence recognition. The recent programmes are not on the list yet, but I am sure you can apply anyway.
The websites state quite clearly that Physios will be assessed on an individual basis. So even if someone with a Scottish degree got accepted for equivalence, this might not apply to you. That's as exact an information as you will get it. No guarantees.
And anyway - who knows what the situation will be like in 4 years?

in order work there
Do you mean registration or actual work? In order to work there you need registration and then a work permit/ visa.
That's a whole new ballgame. :-)

Good luck,
Fyzzio