Patch -assembly issue

[muddasirqdiwai]

Hi

I created installer that included two assemblies , installer will just install those assemblies in GAC

then i added third asembly into installer

i gave the patch reference for the previous msi (which installed 2 assemblies ) then i build patch patch executed perfectly but it didn't install third assembly

if i repeat whole process by taking normal files as example it work perfectly

patch will install new txt file

i saw difference when i build patch when i build patch for assemblies it miss line (copying assemblies ) but when i build patch installer for txt files it shows those files being copied

can u tell me how can i fix this problem