如何用LabVIEW驱动程序来控制33522A函数发生器

我正在尝试使用National Instruments网站上提供的labview驱动程序来控制33522A函数发生器。
现在我只是运行一个示例VI，以确保在将其集成到我的项目之前了解一切是如何工作的。
当我第一次启动函数发生器时，我可以在MAX中看到它并且VI运行正常。
然而，在我停止VI并尝试再次运行之后，MAX再也看不到它了，LabVIEW开始给我错误，直到我循环上电。
我第一次尝试在成功运行后运行它会给我以下错误：VISA：（HEX 0xBFFF0015）超时在操作完成之前到期。
每次我尝试运行它后，它会给我一个不同的错误：VISA：（Hex 0xBFFF0011）位置信息不足或系统中没有设备。
我仍然可以在Windows设备管理器中看到它，但MAX无法看到它，LabVIEW将不会与它进行交互，直到我循环上电。我在Windows 7上运行LabVIEW 2009 SP1（32位）。我
我也尝试在另一台计算机上运行它与几乎相同的设置，但一些模块的较新版本（但可以在下面的链接找到相同的驱动程序）和经历完全相同的问题。驱动链接：http：//
sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=17973非常感谢任何帮助。



     以下为原文

  I'm trying to control the 33522A function generator using the LabVIEW drivers provided on the National Instruments website. Right now I'm just running one of the example VIs in order to make sure I understand how everything works before integrating it into my project. When I first start up the function generator I can see it in MAX and the VI runs fine. However, after I stop the VI and try to run it again MAX can no longer see it and LabVIEW starts giving me errors until I cycle the power. The first time I try to run it after a successful run it gives me the following error: VISA: (HEX 0xBFFF0015) Timeout expired before operation completed. and every time I try to run it after that it gives me a different error: VISA: (Hex 0xBFFF0011) Insufficient location information or the device is not present in the system. I can still see it in the Windows Device Manager, but MAX can't see it and LabVIEW won't interact with it until I cycle the power.

I'm running LabVIEW 2009 SP1 (32-bit) on Windows 7. I've also tried running it on another computer with pretty much the same setup but newer versions of some of the modules (but the same driver which can be found at the link below) and experienced exactly the same problem.

Driver link:
http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=17973

Any help would be greatly appreciated.