在PowerShell 1.0中使用字符串拆分和制表符

I'm processing tab-separated text file (ANSI) in powershell 1.0 and for some reason I can't split text in the file into multiple fields using split function. The code below always returns 1 although there are 5 values separated by tab in each line of the file. I'm processing tab-separated text file (ANSI) i