Support reaction and beam end results do not match

I need held regarding the following:

Model details:

Slab (plate elements) resting on beam (member) on one long side only. Supports; fixed at both ends.

Slab size: 4m x 2m x 1m; Mesh size 0.2m x 0.2m

Beam length: 4m (split in to size of 0.2m length), Section size 200mm x 200mm

Load: Self wt of slab only

Problem:

The support reactions and the beam end forces do not match at the supported nodes.

Thanks.