Execute console application with parameter from c program.

hi all, i'm trying to execute a console application(written in vb.net vs2003) with a single parameter from a c progam, the code of my c program is as attached, the SendAlert.exe is working if i'm execute it from the run command with the parameter i added, but it just refuse to work when trying to execute it from the c program.

by using system(str2), the following msg returned:
'C:\CPP\SendAlert.exe' is not recognized as an internal or external command, operable program or batch file.
Press any key to continue
this is the command line executed:"C:\CPP\SendAlert.exe" Packaged tester 30 april 08

for ShellExecute(NULL, "open", str2, NULL, NULL, SW_SHOWNORMAL); and WinExec ( str2, SW_SHOWNORMAL);
nothing has been done

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void main()
{
	char str1[255];
	char str2[]="\"";
	GetCurrentDirectory (255,str1);
	strcat(str1,"\\SendAlert.exe\" ");
	strcat(str2,str1);
	char str3[]="Packaged tester 30 april 08";
	strcat(str2,str3);
	system(str2);
	//ShellExecute(NULL, "open", str2, NULL, NULL, SW_SHOWNORMAL); 
	//WinExec ( str2, SW_SHOWNORMAL);
}