calling .net reference from PB Classic

Hi all,

I have a problem with calling the class of the .NET from PowerBuilder 12.5 classic.

My actions:

1)  I have created a project .NET Windows Forms

2) Add a reference to .NET library FileNet.Api.dll

3) I have created a nonvisual object nvo_filenet

4) Add a method of this object of_connect ( string as_password , string  as_userName, string as_uri  )

#if defined PBDOTNET then

  FileNet.Api.Authentication.UsernameCredentials luo_creds

  FileNet.Api.Util.ClientContext luo_Context

  FileNet.Api.Core.IConnection luo_Connection

  luo_creds = CREATE FileNet.Api.Authentication.UsernameCredentials

luo_creds.Password = as_password

luo_creds.Username = as_userName

FileNet.Api.Util.ClientContext.SetProcessCredentials( luo_creds )

luo_Connection = FileNet.Api.Core.Factory.Connection.GetConnection( as_uri )

i_isCredentialsEstablished = true

#end if

But to build my application was not occur, an error message - "Cannot find executable file"

How to call .net classes from external libraries ?