Getting error while enabling the connection


I am getting one error while enabling JDBC connections. No buffer space available (maximum connections reached?): JVM_Bind

But there are only 3 JDBC connections enabled and these connections were also enabled before, but now i am getting this error while trying to enabling this.

The same error I am getting while testing one Remote Server connection and testing Functional Alias also.

I am using WebMethods 6.1.

Can anyone tell me what is the reson for this & how to resolve this.

Thanks in advance,