Question regarding SPSS and SmartPLs

I am using both software SPSS and SmartPls for my research work. I checked correlation with SPSS and and path coefficients with smartpls. I found all my constructs are positively and significantly (p=0.000) correlated with each other. But in path coefficient, one construct shows negative and insignificant impact on other construct and one one construct shows positive but insignificant impact on dependent variable. So please tell me whether is it possible?