The error message clearly explains what's happening. The compiler cannot find the file "streambuf" which is tried to be included from "ios".
Verify the file exists in either:
E:\compilers\Microsoft SDKs\Windows\v7.1\Include
...or:
E:\compilers\MVSVC6.0\VC98\INCLUDE
BTW: You are mixing a very outdated compiler with a very recent Windows SDK. Sooner or later this is not going to work anyways. Visual C++ v6 ships with it's own SDK which you should use. Such mixture is no good.
BTW: This is a compiler issue, not a C::B issue, so I am locking the topic now as it actually violences our forum rules.