Workflow not working for Custom Module

Hello all
Help please workflow is not working for custom module . I already asked this question before . Have a look please.

I have a Module “Vendor” and field “Availability” when task is assign to that any vendor field “Availability” value should change to Busy and vice-versa . I know this looks very easy using workflow but unfortunately its not working. Help Please.

You guys are awesome because of you i made all previous scenarios possible .Thank you for helping.

Good morning,
can you post some screenshots with all involved settings (including the subpanels from the current workflow)?

Good morning Sir
Just a minute i am sending you the screenshots.

Please have a look

Below is the screenshot for my workflow

Hello sir

This task is completed i try using logic hooks and it works fine. Thank you.